21870840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 70917120

約数和(自身を除く): 49046280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 68, 71, 85, 102, 120, 136, 142, 151, 170, 204, 213, 255, 284, 302, 340, 355, 408, 426, 453, 510, 568, 604, 680, 710, 755, 852, 906, 1020, 1065, 1207, 1208, 1420, 1510, 1704, 1812, 2040, 2130, 2265, 2414, 2567, 2840, 3020, 3621, 3624, 4260, 4530, 4828, 5134, 6035, 6040, 7242, 7701, 8520, 9060, 9656, 10268, 10721, 12070, 12835, 14484, 15402, 18105, 18120, 20536, 21442, 24140, 25670, 28968, 30804, 32163, 36210, 38505, 42884, 48280, 51340, 53605, 61608, 64326, 72420, 77010, 85768, 102680, 107210, 128652, 144840, 154020, 160815, 182257, 214420, 257304, 308040, 321630, 364514, 428840, 546771, 643260, 729028, 911285, 1093542, 1286520, 1458056, 1822570, 2187084, 2733855, 3645140, 4374168, 5467710, 7290280, 10935420, 21870840]

約数ペア:

[(1, 21870840), (2, 10935420), (3, 7290280), (4, 5467710), (5, 4374168), (6, 3645140), (8, 2733855), (10, 2187084), (12, 1822570), (15, 1458056), (17, 1286520), (20, 1093542), (24, 911285), (30, 729028), (34, 643260), (40, 546771), (51, 428840), (60, 364514), (68, 321630), (71, 308040), (85, 257304), (102, 214420), (120, 182257), (136, 160815), (142, 154020), (151, 144840), (170, 128652), (204, 107210), (213, 102680), (255, 85768), (284, 77010), (302, 72420), (340, 64326), (355, 61608), (408, 53605), (426, 51340), (453, 48280), (510, 42884), (568, 38505), (604, 36210), (680, 32163), (710, 30804), (755, 28968), (852, 25670), (906, 24140), (1020, 21442), (1065, 20536), (1207, 18120), (1208, 18105), (1420, 15402), (1510, 14484), (1704, 12835), (1812, 12070), (2040, 10721), (2130, 10268), (2265, 9656), (2414, 9060), (2567, 8520), (2840, 7701), (3020, 7242), (3621, 6040), (3624, 6035), (4260, 5134), (4530, 4828)]